Ritchie - Helmsman Compass - Flush Mount - White - HF-743W. Helmsman Compass Features:. 3-3/4" CombiDamp Dial. Easily Installed, Fits 4" (10.16 cm) Mounting Hole. Exclusive Built-in Green NiteVu Night Illumination. Built-in Compensators to Easily Adjust for Deviation. Scientifically Matched Sapphire Jewel and Hardened Steel Pivot Dial Movement. Powerful DirectiveForce Magnets for Fast Heading Lock-on. Movable Sun Shield. 45 Degree Lubber Lines. High Temperature Composite Construction for Extended Operating Range. Custom Fitted Protective Covers Available. 100% Repairable. Exclusive 5-Year Ritchie Warranty. Approx. Shipping Weight: 2lbs (907g). Notes:. All magnetic compasses come standard with 12 volt lighting. 24 & 32 volt lighting options are available.. Some custom built OEM models may have different lighting.